Low-pressure gas burner



March 2321926.- 1,578,210

H. D. SCHRADER Low PRESSURE @As BURNER Filed August 17, 1925 11E-* l- TIE- E l@ f. Moe/wlloz @wm/mo l m 3fm/wf@ atented Mar. 23, 1926.7

i U'NiTEn serai` f i maar@ es PATENT orties.

HAROLD D. SGHRADER, OF MIDWEST, WYOMING, ASSIGNOR"OF ONE-HALF TO DEO MAYNARD STA'UFFER, OF MIDWEST, WYOMING.

LOW-PRESSURE GAS BUB-NER.

Application led August '17, 1925. Serial' No. 50,751.

To all whom t may concern.'

Be it known that I, HAROLD D. SGHRADEB.,

a citizen of the United States, residing at Midwest, in the county of Natrona and State of W'yoming, have invented certain new and useful Improvements in Low-PressureGas Burners; and I do declare the following to be a full, clear, and exact description of the invention, such aswill enable others skilled` in the art to whichy it appertains to malte and use the same.

My invention aims to provide a new and improved form of gas burner which, even thoughthe gas pressure may be low, will evenlyvdistribute the gas in the arms or legs of the burner, thereby overcoming the liability of dust and carbon being deposited in and clogging the outlet perforations from portions'of said arms or legs', insuring even temperature of gas and also insuring that no dead space shall exist in tie burner with the possibility of burning the latter out.

A further aim is to so position the discharge perfor-ations of the burner that they will induce the flow ofV air around all of the burner arms and around the vouter extremities of the latter, so that the burner head is kept at a comparatively low temperature, the arrangement of perforations also serving to induce the flow of air through an air admission cylinder, in whose inner endV the burner head is located. The arrangement of perforations also servesto induce flow of air into the fire box through any other admission passage which may be provided, and the burner may be used with any other forced draft or induced draft system if desired, in order to obtain high ratings for' boilers. From my experience with this burner, it will develop 130% boi er rating with natural draft and by` applying forced draft, it has developed as high as 300% boiler rating, on a 1300 H. P. Babcock and lVilcoX boiler, one hundred burners being used. Y

A still further object is to provide la burner which will be simple and inexpensive,

yet will be exceptionally efficient and desirev able, whether used in large furnaces or in small domestic heating plants, or in any other connection to which it is suited.

TWith the foregoing in view, the invention resides in the novel subject matter hereinafter described and claimed, the description beingV supplemented by the accompanying drawing.

vFigure l is a front elevation of a burnerl constructed in accordance with my inveiition'. A

Figure 2 is a vertical sectional view on line 2 2 of Fig. l.

Figures 3 and t are detail transverse sectionsv on linesB-S and 4-4 of Figy2.

vFigure 5 is a side elevation of the burner Yarranged iii the air admission Cylinder.

In the drawing above briefly described, the numeral l designates a hollow hub which is connected Vith a gas supply pipe 2 in any suitable manner, for instance by threading the pipe into the rear end of the hub. Integral with the front end of this hub and radiating therefrom, are a number of'arins 3 which are disposed in a. common plane, said arms being iii communication with each other at u central point. At this point, the innerends of the arms have restricted communication with the interior of the hub l, by a port 4. Formed longitudinally in the rear or inner walls of the arms, are fuel ports 5 which lead from the interior of the hub l, the outer ends of these ports being in communication with the outer ends of the arms 3, by ports 6. kThis arrangement of passages and ports, insures an even distribution of gas throughout the Ylength of each of the arms 3, even though such gas may be under rather low'pressure. i The front wall of each arm 3 is preferably liat, `whereas the vreiiiainin'g exterior portion-of each arm is preferably rounded as sho-wn, to offer minimum resistance to the passageof air around all portions of thev burner head.v Each front wall Z is formed with two parallel rows of gas escape perforations 8. These perforations are formed on 4such angles as to discharge the gas be tween the arms of the burner head on lines at 0 .in 5. This cylinder may of course be formed of any desired material or materials, and it is preferably provided with a separate end section 9a, which may be renewed when it becomes burned, without disturbing the furnace front setting. Tile or any other refractory material is suitable for this cylinder. rEhe ends of thearms 3 are then in spaced relation with the cylinder' wall and passage of air around said ends is induced by perforations lO, one of which is located in the outer end of each wall 7, said perforations l0 being located to discharge the gas outwardly on lines which widely diverge with the plane in which the burner read is located. Y

The improved burner may be installed in connection with numerous forms of furnaces or other heating devices and when it is used with a long lire box, `he gas discharge perforations may be disposed at such angles to the burner arms as to direct the gas almost straight inwardly, but when a larger and shorter fire box is to receive the flame from the burner, the perforations are preferably drilled to give the flame more spread, and it will be obvious that the burner may be constructed in numerous sizes and with more or less perforations according to the conditions to be met. ln all instances, y

the device will be highly efficient and desirable, will give uniform discharge of air throughout the length of the arms, will not clog up, will be uniformly heated, and will induce the entrance of an abundance of fresh air both between the burner arms and around the ends of the latter, insuring that the burner head shall remain comparatively cool and shall not be in danger of burning out.

its excellent results are obtainable from the details disclosed, they are preferably followed. However, within the scope of the invention as claimed, slight modifications may of course be made.

I claim :h y

l. 'A gas burner comprising an air admission cylinder, and a burner head in the delivery end of said cylinder having a plurality of radial arms disposed in a plane at right angles to the aXis of said cylinder and terminating in spaced relation therewith,V

each of said arms having two parallel longitudinal Vrows of perforations, the perfora tions along any two adjacent portions of any two arms being arranged to discharge gas between said arms on lines which are parallel with each other and diverge widely from the aforesaid plane toward the wall of the cylinder, the outer ends of said arms each having a central perforation also disposed to discharge the gas on a line which diverges widely from the aforesaid plane toward the said plane toward the periphery of thehead.

3. l burner head comprising a hollow hub ha ing a gas inlet, and a plurality of hole low arms integral with and radiating from the front end of said hub, said arms being in eomn'iunication with each other at a central point and at said point having direct communication with said hollow hub by means of a port, the rear walls of said arms being formed with longitudinal fuel passages leading from the interior of said hub, said passages and arms ,being in communica tion at the ,outer ends of the latter by means of ports, said arms being escape perforations.

in testimony whereof I have hereunto affixed iny signature.

Hanorin D. sorrisiinna provided with fuel' 

